21. An officer reassigned to a position of union member or unionizable non-member shall receive a salary corresponding to the classification established by the employer in compliance with the salary provisions applicable to the position.If the salary the officer was receiving before the reassignment is higher than the salary established pursuant to the first paragraph, the former salary is maintained provided it falls within the salary scale for the new position and does not exceed the maximum of the scale; in this latter case, the salary shall be reduced to the maximum of the scale.
If the salary of the officer is reduced following the reassignment:
— for the first 3 years following the reassignment, the officer shall receive, in the form of lump sum payments, the full difference between the salary he was receiving prior to the reassignment and the new annual salary to which he is entitled;
— for the fourth year following the reassignment, the officer shall receive, in the form of a lump sum payment, two-thirds of the difference between the salary he was receiving prior to the reassignment and the new annual salary to which he is entitled in that fourth year;
— for the fifth year following the reassignment, the officer shall receive, in the form of a lump sum payment, one-third of the difference between the salary he was receiving prior to the reassignment and the new annual salary to which he is entitled in that fifth year.